Electronic Associates

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Electronic Associates, Inc. (EAI)
HeadquartersLong Branch, New Jersey 185 monmouth parkway (before Bell Labs)
ProductsAnalog computers

Electronic Associates, Inc. (EAI) was founded in 1945 by Lloyd F. Christianson and Arthur L. Adamson and began manufacturing analog computers in 1952.[1] Their systems were used by NASA to develop space probes and simulate physical systems.[2] As digital technology matured, they began production of both hybrid digital/analog systems, such as the EAI680 with 156 amplifiers, diode function generators and servo-controlled potentiometers to control input parameters, and digital computers such as the EAI 640.[3][4]

Under the direction of Robert E. Finnigan, the company developed the first quadrupole gas chromatography–mass spectrometry devices and sold over 500 devices between 1965 and 1966, which accounted for most of the firm's profit.[5]

Other notable employees include Hans Witsenhausen and board member Everard Mott Williams.

In 1963, the company acquired Pacific Data Systems (PDS) from Mesa Scientific Corporation of Inglewood, California.[6] PDS continued to operate as a subsidiary of EAI for several years, manufacturing general-purpose minicomputers built into desks.[7]


  1. ^ James S. Small (2001). The Analogue Alternative - The Electronic Analogue Computer in Britain and the USA, 1930-1975. p. 129. ISBN 0415271193. Retrieved 2015-12-10.
  2. ^ "Company: Electronic Associates, Inc (EAI)". Computer History Museum. Retrieved 2015-12-10.
  3. ^ "Electronic Associates Incorporated". Doug Cowards Analog Computer Museum. Retrieved 2015-12-10.
  4. ^ "EAI 640 Brochure". Computer History Museum. Retrieved 2022-10-04.
  5. ^ Brock, David C. (2011). "A Measure of Success". Chemical Heritage Magazine. 29 (1). Retrieved 28 January 2018.
  6. ^ Staff writer (October 31, 1963). "EAI Acquires Pacific Data Systems Firm". Ashbury Park Press: 28 – via Newspapers.com.
  7. ^ Addeo, Samuel (May 24, 1965). "Electronic Associates 20 Years Old". The Daily Record: 12 – via Newspapers.com.
  • Small, James S. (1993). "General-purpose electronic analog computing: 1945-1965". Annals of the History of Computing. IEEE. 15 (2): 8–18. doi:10.1109/85.207740. ISSN 1058-6180. S2CID 15300198.
  • Abramson, Jill; Pound, Edward T. (7 December 1990). "If Crisis Eases, Iraq Would Still Pose a Threat for Which the U.S. Must Shoulder Some Blame". Wall Street Journal. New York, N.Y.: Dow Jones & Company Inc. p. A16. ISSN 0099-9660. ProQuest 398296683. ... Electronic Associates Inc., which supplied a powerful, $500,000 analog computer that could be used for missile testing and development for Saad 16.